Combined compass and protractor



Feb. 2 92 1,571,261

E. E. GINTER COMBINED COMPASS AND PROTRACIOR Filed May 5, 1925 15.2. a m/5r (for an.

Patented F eb; 2, 1926.

UNITED STATES EARL EDGAR GINTER, F RANSHAW, PENNSYLVANIA.

COMBINED COMPASS AN 'D PROTRACTOR.

Application filed May 5, 1925. Serial No. 28,135.

To all whom it may concern:

lit

Be it known that l, EARL E. GINTER, a citizen of the United States, residing at Ranshaw, in the county of Northumberland and State of Pennsylvania, have invented cer-. tain new and useful Improvements in CombinedCompasses and Protractors, of which the following is a specification.

The present invention relates to a com bined compass and protractor, and has for its principal object to provide a device which is eflicient and reliable in measuring angles, and will be particularly useful to such persons as draftsmen, engineers, carpenters, etc.

The invention contemplates the provision of an exceedingly simple structure which may be placed on the market at-a relatively low cost, and one which is not likely to easily become outiof order, is strong, durable, light, compact, and otherwise well adapted to the purpose for which it is designs a With the above and numerous 'otherobjects in view, as will appear as the description proceeds, the invention resides in certain novel features of construction, and in thevcombination and arrangement of parts as will be hereinafter more fully described and claimed In the drawing:

- Figure 1 is a side elevation of the device vembodying the features of my invention.

Figure 2 is a fragmentary detail section -on an enlarged scale, taken through an intermediate portion of one leg, of the device.

Figure 3 is a section similar to that shown" in Figure 2,'but being taken at right angles thereto, and a Figure 4 is a fragmentary enlarged detail section through the free end of the eg-shown in Figures 2 and 3.

Referring to thedrawing in detail, it will be seen that numerals 1 and 2 designate the le s of the combined compass and protractor which are pivoted together, asat3, and the lower ends thereof terminate in points as at The leg 2 is of a tubular formation and has a drum 5 formed in an intermediate por tion thereof. The axis of the drum is disposed'at right angles to the axis of the tubular legit, Une end of the drum 5' is closed, at it, while the other end is provided with detachable closure 21 A shaft 2 is jouri. led between the closures 6 and 7 and is disposed coaxially with the drum 5. The drum 5 provided with a window 9 A disc 10 is fixed to the shaft 8 and provided with an annular flange or rim 11, which is adapted to move over the window 9 and has on its exterior surface suitable indicating indicia, which may be seen through the window 9 for a purpose to be brought out later. A shaft 12 is journaled through the bottom portion of the drum and extends downwardly through the le 2 co axially there with, and terminates a jacent a slot 13 provided in the leg 2 adjacent its point 4. An arm 14 is pivoted on the lower extremity of theshaft 12 and when swung about the axis of'the leg 2 im arts rotary motion to the shaft 12. Anee le15 is pivoted on the end of the arm 14. A bevelled gear '16 is fixed to the. upper end of the shaft 12 and meshes with a bevelled gear 17 fixed to the shaft 8;

A coil spring 18 is disposed about the shaft 8 and has one end fixed to the disc 10 and theother end fixed't'o the closure 6. An

arcuate rod 19 is fixed. to the leg 2 and'extends through a slot 20; in the leg 1, so that the legs 1 and 2 may be held in different ad justed angular positionsin relation to each.

other, by the binding screw 21 in the leg 1 engagin the rod 19. This rod 19 may be provide with suitableindicia so as to indicate the angle between the legs 1 and 2.

Inusin this device, the point t of the 'leg 2 is p acedatthe vertex of the angle and the needle 15 engaged with one side of the angle. The point d'ofthe leg 1 is then moved so as to engage theother leg of the angle. As the leg 1 is swun so as to engage the other leg of the ang e, the tubular leg 2 is revolved about the shaft 12, there by causing themtation ofthe gear 16 since it moves inen orbit about the axis of the shaft 12, and since it is in mesh with the gear 17, said gear 17 will rotate, thereby rotating the [shaft 8,,the 11, so. as to tension the spring 18. The indicia read through the window 9 will designate the angle in degrees or any other suitable measuring unit. A stop 23" is provided in the drum dandis engageable by a lug 2 1 disc 10, and the rim extending from the rim 11. The spring 18 I normally holds the rim at zero indicating position and likewise holds the arm 14 and legs land 2 in the same plane. i

lit is thought that the construction, opera tion, utility, and advantages of the invention will now be clearly understood without a more detailed description. it is desired, however, to point out that numerous llll chan es'in the details of construction, and

in t e combination and arrangement of arts may be resorted to without departing rom the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages. v

Having thus described my invention, what Iclaimasnewis:

- 1. A device of the classfdascribed including a-pair of legspivoted together, an arm extendm from one of the legs, meansassociated with said arm for engaging one side of an an le, and an indicating mechanism adapted to swing through the slot, an en-- gagmgmember on the arm, an indicating mechanism, and means operatlvely connecting the shaft and the indicating mechanism.

3.'In a device of the class described, a'

pair of le pivoted together at adjacent ends, one-o said legs'being tubular-and provided with a drum formed intermediate its ends, said drum provided with a window, a

shaft journaled m' the drum, an indicatormounted on the shaft, so as to be read throu h the window, a gear onthe shaft, a secon shaft f'ournaled through the drum and longitudinal y of the tubular leg and provided with a gear atone end meshing with the first mentioned gear, said tubular member provided with a slotadjacent the end of the second shaft, an arm extending through the slot and pivoted to the adjacent end of the second shaft, an engaging member on the arm. 7 f 1 4. In a device of the class described, a pair of legs pivoted together at adjacent ends, one of sald legs being tubular and provided with a drum formed intermediate its ends, said drum provided with a window, a shaft 'ou'rnaledin the drum, an indicator mounte on the shaft, so as to be read through the window a gear on the shaft, a

second shaft journaled through the drum and lon itudinally of the tubular leg and provide with a gear at one end meshing with the first mentioned gear, said tubular throughthe slot and pivoted to the adjacent end of the second shaft, an" engaging member'on the arm and a spring associated with the shaft for holding the arm in substantially the same plane with the legs and the indicating device at a zero indicatiiig position,

In testimony whereofI'afiix m signature.

- a EARL EDGAR INTER.

member provided with a slot adjacent the end of the second shaft, an armextending 

